A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

Diagnostic problems...ideas?

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Old Aug 15, 2003 | 10:14 AM
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Default Diagnostic problems...ideas?

My air bag light has been on all week, so I took the car into my local foriegn auto servicer to diagnose the problem. He said that the diagnostic tool is not communicating with the car, and is reading NO codes. I had an aftermarket radio put in about 3 weeks ago but specifically told the professional installer not to hook up the K-wire. He agreed and and seemed to be aware of the problem already, so I really don't think this is the cause. Any ideas of what the problem may be and steps to fix it? Info appreciated.
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Old Aug 15, 2003 | 10:17 AM
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Did you cut power to the car (unplug battery) at any point before the light came on?
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Old Aug 15, 2003 | 10:19 AM
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Default No, not unless ...

...it was done during the radio or speaker install, but I don't think it was.
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Old Aug 15, 2003 | 10:19 AM
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easy way to tell - did your one-touch window feature still work after radio installed?
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Old Aug 15, 2003 | 10:21 AM
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Yep, windows go up and down w/ one touch
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Old Aug 15, 2003 | 10:24 AM
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Default Since they wouldn't have thought to reset this, I'd bet they didn't unplug your battery...

I was suspect of this because I had an airbag light problem after I replaced my battery. It acted different, though. It would stay on for a few minutes in really cold weather and start blinking at a quicker pace until the car got to a certain point in warming up, then went out. This only happened in cold weather and the warmer it was, the quicker this entire process was. My shop told me that the battery being unplugged can cause that and after they reset the light, it never came back. Sorry to waste your time with an irrelevant story.
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Old Aug 15, 2003 | 10:29 AM
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Default OK, that may account for the light, but what about...

...the fact that the diagnostic tool is not reading any codes for my car? Thats what I'm really trying to figure out here.
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Old Aug 15, 2003 | 10:34 AM
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I don't know if mine sprung a code (is that possible?) Can they clear the light?
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